Cassette AC Suction Grill Support to Prevent Drooping
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Solution Overview
Problem
Cassette type air conditioners face challenges with the design of their indoor units, particularly in maintaining the structural integrity and aesthetics as the suction grill increases in size, leading to drooping issues and interference with the panel, which affects airflow and ease of maintenance.
Innovation Solution
The indoor unit incorporates a grill restriction member and a connection member that couples the suction grill to the panel, preventing drooping and allowing for easy opening and closing, while maintaining a unified appearance and ensuring efficient airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction grill size is increased to improve airflow capacity, then the airflow efficiency is improved, but the structural stability deteriorates causing drooping
Solution Approach 1:
The support structure is divided into multiple independent support portions distributed across the panel, with additional reinforcement members providing localized support at critical areas. This segmentation allows the large suction grill to be supported by multiple discrete points rather than requiring a continuous heavy framework, maintaining stability while preserving airflow capacity.
Solution Approach 2:
Reinforcement members are strategically positioned at specific locations where drooping is most likely to occur, such as at the corners and along the edges of the suction grill. This localized reinforcement provides targeted structural support only where needed, rather than uniformly strengthening the entire panel, thus maintaining aesthetic appearance and airflow while preventing drooping.
2Productivity
If the suction grill is made larger to enhance cooling performance, then the heat exchange efficiency is improved, but the aesthetic appearance deteriorates due to drooping
Solution Approach 1:
Reinforcement members are strategically positioned at specific locations where drooping is most likely to occur, such as at the corners and along the edges of the suction grill. This localized reinforcement provides targeted structural support only where needed, rather than uniformly strengthening the entire panel, thus maintaining aesthetic appearance and airflow while preventing drooping.
3Ease of manufacture
If the suction grill structure is simplified for ease of manufacture, then the manufacturing cost is reduced, but the structural integrity deteriorates leading to drooping
Solution Approach 1:
The support structure is divided into multiple independent support portions distributed across the panel, with additional reinforcement members providing localized support at critical areas. This segmentation allows the large suction grill to be supported by multiple discrete points rather than requiring a continuous heavy framework, maintaining stability while preserving airflow capacity.
4Ease of repair
If the suction grill is designed to be easily removable for maintenance, then the ease of maintenance is improved, but the structural stability deteriorates causing drooping
Solution Approach 1:
The support portions and reinforcement members are pre-installed on the panel during manufacturing, providing structural stability before the suction grill is attached. This preliminary support structure ensures that when the suction grill is removed for maintenance, the underlying support system remains intact to prevent drooping, and the suction grill can be easily reattached without compromising structural integrity.
Data Source
AI summary
An indoor device for a cassette type air conditioner is provided. In the indoor device, a suction grill restricter to couple the suction grill to a panel to prevent outer edges of the suction grill from drooping may be provided to maintain a more stable coupling state, preventing dew condensation and noise from occurring.